Paper Towns - by John Green
Quentin Jacobsen has spent a lifetime loving the magnificently adventurous Margo Roth Spiegelman from afar. So when she cracks open a window and climbs back in the middle of the night—dressed like a ninja and summoning him for an ingenious campaign of revenge—he follows.

After their all-nighter ends, and a new day breaks, Q arrives at school to discover that Margo, always an enigma, has now become a mystery. But Q soon learns that there are clues--and they’re for him. Urged down a disconnected path, the closer he gets, the less Q sees the girl he thought he knew.

Bestselling author and Printz Medalist John Green's brilliant wit and searing emotional honesty have inspired a new generation of readers.